diff options
Diffstat (limited to 'arch/arm/mach-lpc32xx/timer.c')
| -rw-r--r-- | arch/arm/mach-lpc32xx/timer.c | 82 |
1 files changed, 28 insertions, 54 deletions
diff --git a/arch/arm/mach-lpc32xx/timer.c b/arch/arm/mach-lpc32xx/timer.c index 630dd4a74b2..4e5837299c0 100644 --- a/arch/arm/mach-lpc32xx/timer.c +++ b/arch/arm/mach-lpc32xx/timer.c @@ -31,28 +31,14 @@ #include <mach/platform.h> #include "common.h" -static cycle_t lpc32xx_clksrc_read(struct clocksource *cs) -{ - return (cycle_t)__raw_readl(LCP32XX_TIMER_TC(LPC32XX_TIMER1_BASE)); -} - -static struct clocksource lpc32xx_clksrc = { - .name = "lpc32xx_clksrc", - .shift = 24, - .rating = 300, - .read = lpc32xx_clksrc_read, - .mask = CLOCKSOURCE_MASK(32), - .flags = CLOCK_SOURCE_IS_CONTINUOUS, -}; - static int lpc32xx_clkevt_next_event(unsigned long delta, struct clock_event_device *dev) { - __raw_writel(LCP32XX_TIMER_CNTR_TCR_RESET, - LCP32XX_TIMER_TCR(LPC32XX_TIMER0_BASE)); - __raw_writel(delta, LCP32XX_TIMER_PR(LPC32XX_TIMER0_BASE)); - __raw_writel(LCP32XX_TIMER_CNTR_TCR_EN, - LCP32XX_TIMER_TCR(LPC32XX_TIMER0_BASE)); + __raw_writel(LPC32XX_TIMER_CNTR_TCR_RESET, + LPC32XX_TIMER_TCR(LPC32XX_TIMER0_BASE)); + __raw_writel(delta, LPC32XX_TIMER_PR(LPC32XX_TIMER0_BASE)); + __raw_writel(LPC32XX_TIMER_CNTR_TCR_EN, + LPC32XX_TIMER_TCR(LPC32XX_TIMER0_BASE)); return 0; } @@ -72,7 +58,7 @@ static void lpc32xx_clkevt_mode(enum clock_event_mode mode, * disable the timer to wait for the first call to * set_next_event(). */ - __raw_writel(0, LCP32XX_TIMER_TCR(LPC32XX_TIMER0_BASE)); + __raw_writel(0, LPC32XX_TIMER_TCR(LPC32XX_TIMER0_BASE)); break; case CLOCK_EVT_MODE_UNUSED: @@ -84,7 +70,6 @@ static void lpc32xx_clkevt_mode(enum clock_event_mode mode, static struct clock_event_device lpc32xx_clkevt = { .name = "lpc32xx_clkevt", .features = CLOCK_EVT_FEAT_ONESHOT, - .shift = 32, .rating = 300, .set_next_event = lpc32xx_clkevt_next_event, .set_mode = lpc32xx_clkevt_mode, @@ -95,8 +80,8 @@ static irqreturn_t lpc32xx_timer_interrupt(int irq, void *dev_id) struct clock_event_device *evt = &lpc32xx_clkevt; /* Clear match */ - __raw_writel(LCP32XX_TIMER_CNTR_MTCH_BIT(0), - LCP32XX_TIMER_IR(LPC32XX_TIMER0_BASE)); + __raw_writel(LPC32XX_TIMER_CNTR_MTCH_BIT(0), + LPC32XX_TIMER_IR(LPC32XX_TIMER0_BASE)); evt->event_handler(evt); @@ -105,7 +90,7 @@ static irqreturn_t lpc32xx_timer_interrupt(int irq, void *dev_id) static struct irqaction lpc32xx_timer_irq = { .name = "LPC32XX Timer Tick", - .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, + .flags = IRQF_TIMER | IRQF_IRQPOLL, .handler = lpc32xx_timer_interrupt, }; @@ -114,7 +99,7 @@ static struct irqaction lpc32xx_timer_irq = { * clocks need to be enabled here manually and then tagged as used in * the clock driver initialization */ -static void __init lpc32xx_timer_init(void) +void __init lpc32xx_timer_init(void) { u32 clkrate, pllreg; @@ -142,41 +127,30 @@ static void __init lpc32xx_timer_init(void) clkrate = clkrate / clk_get_pclk_div(); /* Initial timer setup */ - __raw_writel(0, LCP32XX_TIMER_TCR(LPC32XX_TIMER0_BASE)); - __raw_writel(LCP32XX_TIMER_CNTR_MTCH_BIT(0), - LCP32XX_TIMER_IR(LPC32XX_TIMER0_BASE)); - __raw_writel(1, LCP32XX_TIMER_MR0(LPC32XX_TIMER0_BASE)); - __raw_writel(LCP32XX_TIMER_CNTR_MCR_MTCH(0) | - LCP32XX_TIMER_CNTR_MCR_STOP(0) | - LCP32XX_TIMER_CNTR_MCR_RESET(0), - LCP32XX_TIMER_MCR(LPC32XX_TIMER0_BASE)); + __raw_writel(0, LPC32XX_TIMER_TCR(LPC32XX_TIMER0_BASE)); + __raw_writel(LPC32XX_TIMER_CNTR_MTCH_BIT(0), + LPC32XX_TIMER_IR(LPC32XX_TIMER0_BASE)); + __raw_writel(1, LPC32XX_TIMER_MR0(LPC32XX_TIMER0_BASE)); + __raw_writel(LPC32XX_TIMER_CNTR_MCR_MTCH(0) | + LPC32XX_TIMER_CNTR_MCR_STOP(0) | + LPC32XX_TIMER_CNTR_MCR_RESET(0), + LPC32XX_TIMER_MCR(LPC32XX_TIMER0_BASE)); /* Setup tick interrupt */ setup_irq(IRQ_LPC32XX_TIMER0, &lpc32xx_timer_irq); /* Setup the clockevent structure. */ - lpc32xx_clkevt.mult = div_sc(clkrate, NSEC_PER_SEC, - lpc32xx_clkevt.shift); - lpc32xx_clkevt.max_delta_ns = clockevent_delta2ns(-1, - &lpc32xx_clkevt); - lpc32xx_clkevt.min_delta_ns = clockevent_delta2ns(1, - &lpc32xx_clkevt) + 1; lpc32xx_clkevt.cpumask = cpumask_of(0); - clockevents_register_device(&lpc32xx_clkevt); + clockevents_config_and_register(&lpc32xx_clkevt, clkrate, 1, -1); /* Use timer1 as clock source. */ - __raw_writel(LCP32XX_TIMER_CNTR_TCR_RESET, - LCP32XX_TIMER_TCR(LPC32XX_TIMER1_BASE)); - __raw_writel(0, LCP32XX_TIMER_PR(LPC32XX_TIMER1_BASE)); - __raw_writel(0, LCP32XX_TIMER_MCR(LPC32XX_TIMER1_BASE)); - __raw_writel(LCP32XX_TIMER_CNTR_TCR_EN, - LCP32XX_TIMER_TCR(LPC32XX_TIMER1_BASE)); - lpc32xx_clksrc.mult = clocksource_hz2mult(clkrate, - lpc32xx_clksrc.shift); - clocksource_register(&lpc32xx_clksrc); + __raw_writel(LPC32XX_TIMER_CNTR_TCR_RESET, + LPC32XX_TIMER_TCR(LPC32XX_TIMER1_BASE)); + __raw_writel(0, LPC32XX_TIMER_PR(LPC32XX_TIMER1_BASE)); + __raw_writel(0, LPC32XX_TIMER_MCR(LPC32XX_TIMER1_BASE)); + __raw_writel(LPC32XX_TIMER_CNTR_TCR_EN, + LPC32XX_TIMER_TCR(LPC32XX_TIMER1_BASE)); + + clocksource_mmio_init(LPC32XX_TIMER_TC(LPC32XX_TIMER1_BASE), + "lpc32xx_clksrc", clkrate, 300, 32, clocksource_mmio_readl_up); } - -struct sys_timer lpc32xx_timer = { - .init = &lpc32xx_timer_init, -}; - |